Guts is a composition of many hundreds of gut instances rendered simultaneously in a radial fashion. The gut is a wandering tube like object. Gross, right?

1000 layers on layers of guts, radial arrangement with irregularities in thickness
The images below are selected regions of detail within a radial gut rendering similar to above. Although every instance of the gut object uses an identical growth algorithm, a confusing collage emerges.
The gut itself is drawn line by line using four specially configured sand stroke objects (see Sand Stroke). The curvy growth pattern is calculated using several additive sinusoidal waves and an irregular progression through time

2000 guts arranged arbitrarily with inward folding bias
Early versions of Guts used a pursuit algorithm similar to the Travelers (see City Traveler, Sand Traveler) although this produced odd shapes.